Dental machinery



July 12, 1927. I 1,635,766 c. A. PRH-:sT v

DENTAL MACHINERY Filed OCT.. l. 1926 I N VEN TOR. Uff/7,615.5 Pf6/:57i

@JMMJ l K A TTORNEY Patenteduuly 12,- 1927.

CHARLES A. PRIEST, F MARION, INDIANA.

DENTAL IVIACIzlINERY.v

Application led October 1, 1926. Serial No. 138,912.

VMy invention relates to dental grinding lnachines and more particularly to such as are designed for use in the finishing work on false teeth. It has for itsobjectthe application of such devices in a more convenient and effective manner Vthan has hitherto been known. In the accompanying drawings I have shown my invention as related to a belt driven machine and in such simple form as will allow any one skilled in the art to readily understand the novelty thereof but my invention is inno way restricted to such relation, nor to the exact details as illustrated and described.

Figure l is the top view of one form ot' my invention.

Figure 2 is a the same form.

Fig. 3 is a perspective view of one commercial form of articulator and the invention applied thereto. Fig. t is asimilar view of another commercial form of articulator and the invention applied thereto.

My invention provides a mandibular motion to the movable portion of any anatomical dental articulator from a rotating shaft or other sourceof power by simple and economical means. l

In Figurey l is shown the eccentric bushing A` which is mounted within` the rotating shaft L to which is rigidly attached the gear M. f This gear meshes with gear N' which is driven by gear O. The pulley I is rigidly attached and concentric with the gear O and is connected with the source of power by means of a belt. The eccentric bushingV A is rotatably mounted within the gear shaft front view, in elevation, of

f L and is held in fixed relation thereto by means of the set screw R.

In Figure 2, the base H is shown on which rests the dental articulator. to be operated.

The articulator is held in place by the clamps F or G dependent on the particular type of articulator used. The rod B which is a part of said articulator and is rigidly fastened to the movable part thereof, passes through the eccentric bushing A oit my machine.

When the power is applied to pulley P, the rod B is moved in circle in a plane parallel tothe base H, and the movable portion of said articulator is thus given the proper movement.

The entire set of gears, pulley, etc. supported by bracket or block X is adjustably mounted along the rod C in a line parallel with the axis of said eccentric bushing and is held vin position by the set screw E. To the base IFI are attached the rubber feet K.

Vhile I have shown my invention in the particular form for belt drive, it is not my intention tol limit my claims to such con struction butto include other methods of drive and forms of mounting'. l

Having thus described my invention, what I claim is new and desire to secure by Letters Patent is:

l. A device of the class described having a set of gears mounted on suitable block, an eccentric bushing mounted eccentrically within the driven gear, a set screw holding said eccentric bushing in any desired position relative to said gear, a pulley directly connected to the driving gear substantially as described. Y

.2. A device of the class described having a set of gears mounted on a suitable block, a pulley directly connected to the driving gear, an eccentric bushing eccentrically mounted within the driven gear, a set screw holding said bushing in fixed position relative` to vsaid gear, means for adjustably mounting said block with said gears on suitable rod parallel to the axis of said eccentric bushing substantially as described.

3. A device for broducing mandibular motion Vin an artieulator comprising a baseV for detachably supporting an articulator having a pin, a support for the articulator pin, mechanism moving said support to se'- cure circular movement of ythe articulator 5. A device as detined by claim 6, wherein.

the pin support includes an eccentric bushing and a shaft adjustably but rigidly mounting the same and by `the moving mechanism including a rotating pulley and gear connection for rotating said shaft.

6. A Vdevice for producing mandibular `pin about an axis eccentric to the piny axis, Y

movement in un articulator having e pin, menne for securing said eccentric Inelnher comprising un artieulator Supporting base, a and Shaft together for simultaneous 1novebracket adjustahly supported thereon for ment and circular movement of the pin about 3U movemezfl; parallel thereto, :1- slmft rotatable an axis eccentric to the pin axis.

.in Suid bracket, means for rotating said n testimonywhereo'II hereunto subscribe shaft, :1 pin support in the form of an eecenlny name this 25th day of September, 1926. trie member coaxial with said shaft, and CHARLES A. PRIEST. 

